mainwindow.cpp Example File | Qt Speech 5.9

Qt 5.9 | Qt Speech | Hello Speak Example | mainwindow.cpp Example File

Qt 5.9.3 Reference Documentation

# mainwindow.cpp Example File

hello_speak/mainwindow.cpp

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      #include "mainwindow.h"
      #include <QLoggingCategory>

      MainWindow::MainWindow(QWidget *parent)
          : QMainWindow(parent),
          m_speech(0)
      {
          ui.setupUi(this);
          QLoggingCategory::setFilterRules(QStringLiteral("qt.speech.tts=true \n qt.speech.tts.*=true"));

          // Populate engine selection list
          ui.engine->addItem("Default", QString("default"));
          foreach (QString engine, QTextToSpeech::availableEngines())
              ui.engine->addItem(engine, engine);
          ui.engine->setCurrentIndex(0);
          engineSelected(0);

          connect(ui.speakButton, &QPushButton::clicked, this, &MainWindow::speak);
          connect(ui.pitch, &QSlider::valueChanged, this, &MainWindow::setPitch);
          connect(ui.rate, &QSlider::valueChanged, this, &MainWindow::setRate);
          connect(ui.volume, &QSlider::valueChanged, this, &MainWindow::setVolume);
          connect(ui.engine, static_cast<void (QComboBox::*)(int)>(&QComboBox::currentIndexChanged), this, &MainWindow::engineSelected);
      }

      void MainWindow::speak()
      {
          m_speech->say(ui.plainTextEdit->toPlainText());
      }
      void MainWindow::stop()
      {
          m_speech->stop();
      }

      void MainWindow::setRate(int rate)
      {
          m_speech->setRate(rate / 10.0);
      }

      void MainWindow::setPitch(int pitch)
      {
          m_speech->setPitch(pitch / 10.0);
      }

      void MainWindow::setVolume(int volume)
      {
          m_speech->setVolume(volume / 100.0);
      }

      void MainWindow::stateChanged(QTextToSpeech::State state)
      {
          if (state == QTextToSpeech::Speaking) {
              ui.statusbar->showMessage("Speech started...");
          } else if (state == QTextToSpeech::Ready)
              ui.statusbar->showMessage("Speech stopped...", 2000);
          else if (state == QTextToSpeech::Paused)
              ui.statusbar->showMessage("Speech paused...");
          else
              ui.statusbar->showMessage("Speech error!");

          ui.pauseButton->setEnabled(state == QTextToSpeech::Speaking);
          ui.resumeButton->setEnabled(state == QTextToSpeech::Paused);
          ui.stopButton->setEnabled(state == QTextToSpeech::Speaking || state == QTextToSpeech::Paused);
      }

      void MainWindow::engineSelected(int index)
      {
          QString engineName = ui.engine->itemData(index).toString();
          delete m_speech;
          if (engineName == "default")
              m_speech = new QTextToSpeech(this);
          else
              m_speech = new QTextToSpeech(engineName, this);
          disconnect(ui.language, static_cast<void (QComboBox::*)(int)>(&QComboBox::currentIndexChanged), this, &MainWindow::languageSelected);
          ui.language->clear();
          // Populate the languages combobox before connecting its signal.
          QVector<QLocale> locales = m_speech->availableLocales();
          QLocale current = m_speech->locale();
          foreach (const QLocale &locale, locales) {
              QString name(QString("%1 (%2)")
                           .arg(QLocale::languageToString(locale.language()))
                           .arg(QLocale::countryToString(locale.country())));
              QVariant localeVariant(locale);
              ui.language->addItem(name, localeVariant);
              if (locale.name() == current.name())
                  current = locale;
          }
          setRate(ui.rate->value());
          setPitch(ui.pitch->value());
          setVolume(ui.volume->value());
          connect(ui.stopButton, &QPushButton::clicked, m_speech, &QTextToSpeech::stop);
          connect(ui.pauseButton, &QPushButton::clicked, m_speech, &QTextToSpeech::pause);
          connect(ui.resumeButton, &QPushButton::clicked, m_speech, &QTextToSpeech::resume);

          connect(m_speech, &QTextToSpeech::stateChanged, this, &MainWindow::stateChanged);
          connect(m_speech, &QTextToSpeech::localeChanged, this, &MainWindow::localeChanged);

          connect(ui.language, static_cast<void (QComboBox::*)(int)>(&QComboBox::currentIndexChanged), this, &MainWindow::languageSelected);
          localeChanged(current);
      }

      void MainWindow::languageSelected(int language)
      {
          QLocale locale = ui.language->itemData(language).toLocale();
          m_speech->setLocale(locale);
      }

      void MainWindow::voiceSelected(int index)
      {
          m_speech->setVoice(m_voices.at(index));
      }

      void MainWindow::localeChanged(const QLocale &locale)
      {
          QVariant localeVariant(locale);
          ui.language->setCurrentIndex(ui.language->findData(localeVariant));

          disconnect(ui.voice, static_cast<void (QComboBox::*)(int)>(&QComboBox::currentIndexChanged), this, &MainWindow::voiceSelected);
          ui.voice->clear();

          m_voices = m_speech->availableVoices();
          QVoice currentVoice = m_speech->voice();
          foreach (const QVoice &voice, m_voices) {
              ui.voice->addItem(QString("%1 - %2 - %3").arg(voice.name())
                                .arg(QVoice::genderName(voice.gender()))
                                .arg(QVoice::ageName(voice.age())));
              if (voice.name() == currentVoice.name())
                  ui.voice->setCurrentIndex(ui.voice->count() - 1);
          }
          connect(ui.voice, static_cast<void (QComboBox::*)(int)>(&QComboBox::currentIndexChanged), this, &MainWindow::voiceSelected);
      }